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Question 1

Group I afferents (70-120 meters/sec)

Answer 1

Ia: muscle stretch - primary spindle receptors
Ia: limb position and movement - spindle receptors
Ib: tendon tension - golgi tendon organs

Question 2

Group II or A-beta afferrents (25-70 meters/sec)

Answer 2

II: muscle stretch - secondary spindle receptors
II: limb position and movement - joint and spindle receptor
A-delta: touch - cutaneous receptors

Question 3

Group III or A-delta afferents (10-30 meters/sec)

Answer 3

III: pressure and pain - deep receptors

A-delta: touch, temp, and pain - cutaneous receptors

Question 4

Group IV or C afferents (.5-2 meters/sec)

Answer 4

IV: pain deep receptors
C: temp and pain - cutaneous receptors

Question 5

Pelagic hair receptors

Answer 5

A-beta fibers, quickly adapting, hair bending

Question 6

Vibrissae receptors

Answer 6

Rapidly adapting and slowly adapting receptors supplies vibrissae (whiskers, sinus hairs, tactile hairs) upper lip or muzzle, chin, above eyes

Question 7

Pacinian corpuscles

Answer 7

The fastest adapting A beta touch fibers

Located primarily in subQ tissue

Question 8

Meissner’s corpuscles

Answer 8

Superficial within dermal papillae of glabrous skin
Supplied by A beta class fibers
Fast adapting

Question 9

Merkel cell

Answer 9

Slowly adapting touch receptor

Located in hairy skin of face, glabrous skin of hand, gingival mucosa

Question 10

Proprioception

Answer 10

Perception of body positions and movement

Question 11

Receptors for cold

Answer 11

A delta and C afferent

Question 12

Receptors for warmth

Answer 12

Only by unmyelinated afferents

Question 13

Rapidly adapting fibers

Answer 13

Discharges briefly, then stops

Transient events such as stimulus contact and movement or high frequency events like vibration

Question 14

Slowly adapting fibers

Answer 14

Discharges for the duration of the stimulus

Maintained events like light pressure

Question 15

The sympathetic preganglionic cell bodies have a

Answer 15

Thoracolumbar origin in intermediate zone

Question 16

The parasympathetic preganglionic cell bodies have a

Answer 16

Craniosacral origin

Question 17

Sympathetic postganglionic cell bodies are located in

Answer 17

Chain ganglia or prevertebral ganglia

Question 18

Parasympathetic postganglionic cell bodies are located in

Answer 18

Specialized parasympathetic ganglia in head or in terminal ganglia near or within visceral organ

Question 19

Symp preganglionic fibers are usually

Answer 19

Short

Question 20

Symp postganglionic fibers are usually

Answer 20

Long

Question 21

Postganglionic fibers are

Answer 21

Unmyelinated (small and slowly conducting)

Question 22

Preganglionic fibers are

Answer 22

Either thinly myelinated or unmyelinated